[Haskell-cafe] Finally tagless and ghc-extensions

Günther Schmidt gue.schmidt at web.de
Wed Oct 28 21:14:42 EDT 2009

Hi all,

ok, I haven't let go on the EDSL subject just yet. I'm still digesting the  
"Finally Tagless" approach from Oleg, Jacques and Chen.

In both, the JFP & APLAS paper, the authors note that no fancy type  
extension are needed for this approach. But in almost every (Haskell)  
example that is a bit more involved the authors do make use of functional  
dependencies and / or type families. GADTs are also being used, although  
*not* in the syntax definition but merely in the semantic instances, I'm  
cool with that :) .

I haven't touched base yet with either functional dependencies nor type  
families as I understand the edges on neither are yet worked out, so I'd  
prefer being able to avoid either when using the tagless approach even in  
more involved settings.

Is that possible?


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